Bookcase



FIG. 1 is a front perspective view of a bookcase, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a side view thereof taken from the right of FIG. 3;

FIG. 5 is an opposite side view thereof taken from the left of FIG. 3;

FIG. 6 is a rear view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a front perspective view of another embodiment of a bookcase, showing my new design;

FIG. 9 is a rear perspective view thereof;

FIG. 10 is a front view thereof;

FIG. 11 is a side view thereof taken from the right of FIG. 10;

FIG. 12 is an opposite side view thereof taken from the left of FIG. 10;

FIG. 13 is a rear view thereof; and,

FIG. 14 is a top view thereof. 

I claim, the ornamental design for a bookcase, as shown and described. 